Figure 1 shows an ERD that is used to develop an information system for contractors. Many-to-many relationships cannot be used directly by most of the database management software. i) Redraw and complete the ERD with suitable attributes (including primary key and secondary key) so that it can be applied in database management software. You may add new entities (if needed) to support your answer. ii) Convert your ERD into tables and insert a few samples of records to show that the database design is applicable